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7019
From: chatillon, [DNS_Address]
Subject: Equids engineer desert water availability
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Digging for water Water is scarce in dryland ecosystems. Some larger animals in these regions dig wells that may provide water to other species. This behavior may have been common among megafauna that are now extinct, especially in North and South America, where megafaunal extinctions were the most severe. Lundgren et al. tested whether feral equids (horses and donkeys) reintroduced to desert regions in the North American southwest dig wells that provide ecosystem-level benefits. They found that equid-dug wells increased water availability, were used by a large number of species, and decreased distance between water sources. Abandoned wells also led to increased germination in key riparian tree species. Such equid-dug wells improve water availability, perhaps replacing a lost megafaunal function. |
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[7020]
7020
From: kay.so.or, [DNS_Address]
Subject: Re: Equids engineer desert water availability
| it was said a long time ago that at some time in the future 'water' will be precious and hard to find like 'gold'. we are seeing more and more desertification and they are now saying that is why some of the ancient settlements and civilizations were abandoned or disappeared when they no longer had the sustaining water. And now of course with the pollution form so many sources, our water many times is not 'life giving' either. sigh |
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